Bevel Gear Strength Calculation With Legacy ANSI
Based on the fixed-end beam calculation. Includes the majority of effects. Accessible only for English units.
Safety factor of contact fatigue

where:
| | S fe | contact fatigue limit (material property) |
| | F t | tangential force acting at teeth |
| | b w | operating tooth width |
Safety factor of bending fatigue

where:
| | s n | bending fatigue limit (material property) |
| | b wF1,2 = min (b 1,2 , b w + 2m) | tooth width for bending |
Factor calculations

where:
| μ | Poisson's ratio (material property) |
E | modulus of elasticity (material property) |
I | geometry factor |
| | 
|
C Li | life factor |
P et | tangential diametral pitch (tangential module reverse ratio) |
C R | reliability factor |
K v | velocity factor |
K o | overload factor |
K m | mounting factor |
J | geometry factor |
C G | gradient factor |
C G = 1 | CG = 1 for P > 5 |
C S | surface factor |
k r | reliability factor |
k t | temperature |
k ms | mean stress factor |